Weaving heddle for rider-movable weaving shaft



P. STAEHLI 3,437,113

WEAVING HEDDLE FOR RIDER-MOVABLE WEAVING SHAFT April 8', 1969 Filed July 12, 1966 United States Patent US. Cl. 139-93 2 Claims ABSTRACT OF THE DISCLOSURE A rider-free weaving heddle for a track member having a single projecting rib portion at one end side thereof and the heddle having a J-shaped hook portion at the end with a back part and a front part forming a recess between them and the back part having an abutment in the lower end of the recess.

This invention relates to a weaving heddle for ridermovable weaving shaft or machine with hook-formed ends to assemble the heddles on the shaft or track and assembled removably on the assembly track.

In order to provide the necessary play and spacing on the assembly track for satisfactory or perfect weaving, the heddles must have the possibility to easily move in a vertical direction for a short distance and at the same time must be held on the assembly track, which can be accomplished providing a projecting attachment nose on one or the other side of the elongated hole or perforation in the heddle.

It is an object of the present invention to provide a simple resistant form for the end portion of the heddle and its longitudinal recess shall be such so that projections are not necessary at undesired locations or a complicated formation and arrangement will not be necessary on the heddle as also on an assembly track for the Weaving frame. The invention consists essentially therein that closed back part on the ends of the weaving heddles each shall have a longitudinal recess, the length being greater than the length of a rib on the end of the track on which the heddles are hooked. The rib together with an abutment in the slot as to the vertical play or movement of the heddles, will limit the movement of the heddles and thus prevent the falling off of the heddles from the track. Thus an open side of the hook part will limit the heddle play or movement in a horizontal direction, but not in a vertical direction. The necessary limit in vertical direction as to play of the heddles is not accomplished by projecting noses, but only as a deposition provided in the rugged back part of the heddle ends.

It was possible to provide a projecting nose or cam against the heddle aXis or shaft but this presents aside from the drawback of a readily and enforced deformable possibility so that the receiving track must be provided with a longitudinal groove in which the heddles can move vertically. This receiving track must be at least so thickly dimensioned that the groove can be applied without influencing the stability of the track. Greater dimensions will result in higher weight and since in a weaving frame the smallest weight saving is of value, the invention presents an essential advantage by having a low weight for the track since the form of the weaving heddles, the receiving track must only be thickened Where the heddles hang over the longitudinal edge. A lateral curvature or vaulting in both or only in one direction is provided at the closed or open side of the hook part of each heddle. This curvature serves the purpose to provide a stable mounting for the heddles on the track.

3,437,l l3 Patented Apr. 8, 1969 Further objects will be apparent from the following description when considered in connection with the accompanying drawing in which:

FIGURE 1 is a side elevation partly in section showing an end of a heddle on an assembly track,

FIG. 2 is a side view of a heddle on its track showing an outwardly curved hook end, and

FIG. 3 is a side view showing a double curvature of the open side of the hook part.

On its end the weaving heddle 10 is provided with a hook 10a, 10b. At the closed hook part 1001, of the heddle 10 there is formed a recess 11 which has a stop or abutment 12 and at the other end there is provided a bent part to form an open hook part 10b to over grip the upper part of the string track 16.

The track portion 16 which is secured on the weaving shaft by means of supports 14 and 18, is provided with a rib 13 surrounded by the heddle hook 10a, 10b and fitting in the recess 11 of the heddle 10, so that the heddle can be vertcally moved on its track 16 to the extent until the step 12 strikes against a stop or abutment 13a of the rib 13 which will provide the necessary play of the heddle for a satisfactory weaving procedure.

The hook part 10a as well as the hook part 10b may have either a projecting curvature or vault-like portion 15, FIG. 2, or double counter-directed curvatures 17, FIG. 3, which provides a stable reinforcement for the heddle 10 on the receiving track 16. Thus in FIG. 2 the hook part 10b as in FIG. 1 is curved or concave-convex as shown at 15 as viewed in end elevation, and as to FIG. 3 the hook part 10]; is straight but the hook part 10a, 10 as in FIG. 1 is reversed curved with two curved or concavoconvex portions 17 as viewed in end elevation.

I claim:

1. Rider-free weaving heddle for a track member having a single projecting rib portion on an end side thereof where the heddle is supported comprising a hook-shaped end which is J-shaped and having a back part and a front part forming a recess between them, said back part having an abutment at a lower end of the recess to cooperate with the rib portion of the track member which latter projects into the recess, said rib portion having a counter stop to cooperate with the abutment in the heddle and the recess in the heddle being of greater length than the rib portion on the track member.

2. In a loom harness comprising a rectangular frame with upper and lower staves arranged in spaced relation, riderless heddle carrying tracks supported by each of said staves, and a plurality of heddles supported between said heddle carrying tracks, each of said heddles having a pair of hook-shaped end portions embracing said heddle carrying tracks, said hook-shaped end portions each having a back part and a front part forming an opening between them, said front part being shorter than said back part in the longitudinal direction of the heddle, each of said heddle carrying tracks having a single longitudinal rib portion projecting towards said back part of the hook-shaped end portions of the heddles and being arranged along one edge of the heddle carrying tracks, said edge being turned away from the other one of said tracks, said back part of the hook-shaped end portions of the heddles having a recess for receiving said rib portion of the heddle carrying tracks, said recess being placed opposite said front part of the hook-shaped end portions and having a width, measured in the longitudinal direction of the heddle, greater than the width of said rib portion and smaller than the width of the heddle carrying tracks measured in the same direction for allowing longitudinal displacements of the heddles with respect of the heddle carrying tracks, said rib portion and said recess having surfaces facing one another and forming abutments for cooperating with one another, said surfaces being plane and ar- 3 4 ranged at right angles with respect to the longitudinal di- 2,478,157 8/1949 Kaufmann 139-96 rection of the heddles, and said front part of the hook- 2,623,547 12/ 1952 Galaher 139-92 shaped end portions of the heddles maintaining said rib 2,623,548 12/1952 Leveque 139-92 portion of the heddle carrying tracks in engagement with 3,088,496 5/1963 Houghton et a1. 139-92 said recess of the back part of said hook-shaped end 5 3,209,789 10/1965 Munch 139-93 portions. 3,322,159 5/ 1967 Kaufmann 139-96 References Cited UNITED STATES PATENTS JAMES KEE CHI, Primary Exammer.

599,836 3/1898 Fehr 139-96 1,379,824 5/1921 Kaufmann 139-96 10 139-96 

